Insofar as Deckard is the character we are made to identify with, he appears to be the film's ostensible hero - he survives.
Intact, the narrative line establishes a clear similarity between Deckard's recognizing how the Tyrell Corporation exploits him and the replicants' rebellion, since both sides — killer and killed — reject their status as servants of the corporation and refuse further exploitation.
In metaphoric terms, humanity Deckard is rendered less than human for ostensibly killing itself; artificiality the Nexus-6 Replicants then becomes more than human for how it values life. The idea of the 'simulacra' lies at the heart of Blade Runner.
There is no finality to these questions information signals, impulses other then the response which is either genetic and immutable or inflected with minuscule and aleatory differences As ideological differences sharpen, mass art tries to accommodate these differences, at the same time that it tries to appeal to differences in the mass audience that it seeks.
After reading an altered version, Dick congratulated Peoples with surprising enthusiasm, claiming his book and the screenplay would now compliment rather than detract from one another.
But they cannot keep this violent hierarchy from collapsing; the replicants prove they can be just as human as the humans themselves.
The riddle was solved when it was recognised that the Mayans, despite their impressive astronomical knowledge, had agricultural practises so primitive that they did not even have ploughs; the farmland around their cities was overused, drained of nutrients, and cities had to be abandoned because staying in them would mean starving to death.